Airtac PB Pen-type Cylinder PB12X125CB
The AirTAC Airtac PB Pen-type Cylinder PB12X125CB is a double-acting pen-size (mini) air cylinder with a Ø12mm bore and 125mm stroke. Its slim round barrel and back cover are stainless steel, the M5×0.8 ports keep plumbing compact, and the fast, low-friction piston suits high-cycle small-part handling.
- BoreØ12 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM10×1.0
- CushionElastic bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PB Pen-type Cylinder PB12X125CB
The AirTAC PB12X125CB is a double-acting JIS pen-size mini cylinder engineered for compact, high-frequency small-part motion. It features a 12 mm bore and a 125 mm stroke, generating 56.5 N of push force and 46.7 N of pull force at 0.5 MPa. The slim SUS304 stainless steel barrel and piston rod provide durability in damp or mildly corrosive environments while keeping weight low for end-of-arm tooling.
This variant includes a CB double clevis back cover, allowing the body to pivot smoothly on a pin mount. Air connections use an M5x0.8 port, and the rod end features an M10x1.0 thread for secure load coupling. Deceleration relies on a fixed TPU bumper at each end, which absorbs impact during the final few millimeters of travel rather than providing adjustable cushioning.
Airtac PB Pen-type Cylinder PB12X125CB Technical Specifications
| Model | Airtac PB Pen-type Cylinder PB12X125CB |
|---|---|
| Series | PB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Elastic bumper (both ends) |
| Max standard stroke | Up to 300 mm |
Specifications follow the official AirTAC PB pen-size datasheet. Piston rod and barrel are stainless steel. Confirm bore, stroke and back-cover option against the product label before installation.
Theoretical Output Force (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 56.5 N | 46.7 N |
| 0.7 MPa (max) | 79.1 N | 65.4 N |
Values are taken from the AirTAC PB thrust table. Because pull acts on the rod-side annular area, pull force is always lower than push. Actual usable force is reduced by friction — size with a margin.
Model Code: Airtac PB Pen-type Cylinder PB12X125CB
| PB | JIS pen-size double-acting mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| CB / U / R | Back cover: CB double clevis, U 90° side inlet, R axial inlet (bore-dependent). |
Mounting accessories: LB, FA, CJ. Related PB-family variants: PSB (single-acting push), PTB (single-acting pull), PBD (double rod), PBJ (adjustable stroke), PBR (front-mount).
Where the Airtac PB Pen-type Cylinder PB12X125CB Is Used
PCB Depaneling Routing
Pivots a light cutting head on the CB clevis to singulate printed circuit boards, utilizing the 56.5 N push force to maintain steady tool pressure without stressing the slim rod.
Pouch Forming Edge Press
Closes a hinged sealing jaw on a vertical form-fill-seal machine, where the compact stainless body resists washdown moisture and the 125 mm stroke accommodates varying bag widths.
Sorter Diverter Arm
Swings a small deflector plate to route lightweight cartons on a packaging line, relying on the double-acting action for fast 50-800 mm/s cycling and immediate retraction.
Is the Airtac PB Pen-type Cylinder PB12X125CB the Right Cylinder?
If you need slightly less force, the Ø10 bore provides 39.3 N of push at 0.5 MPa; stepping up to the Ø16 bore yields 100.5 N. Because the thin Ø5 mm piston rod is designed for coaxial thrust over its 125 mm stroke, adding an external guide or linear bearing is recommended if the application involves any off-axis loads.
A standard PB cylinder does not hold its position if air pressure drops or the valve is centered, as the piston will drift and the bumper only decelerates near the stroke end; apply an external rod lock for fail-safe holding. To order, confirm the 12 mm bore, 125 mm stroke, M5x0.8 port, CB double clevis back cover, and whether you need a mounting bracket like LB, FA, or CJ.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Slim pen body vs. a standard round cylinder
- ✓ Back cover: CB / U / R inlet direction
- ✓ Magnet (S) for sensors?
- ✓ Mounting: LB / FA / CJ or front thread
- ✓ Keep the load coaxial — avoid side load
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 0.7 MPa operating pressure.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
- check Fit dust caps to ports during long-term storage.
- check Installation by qualified personnel per AirTAC docs.
Airtac PB Pen-type Cylinder PB12X125CB FAQ
At 0.5 MPa, this 12 mm bore cylinder provides 56.5 N of push force and 46.7 N of pull force. At the maximum operating pressure of 0.7 MPa, the push increases to 79.1 N and the pull to 65.4 N. The operating pressure range is 0.15-0.7 MPa, with a speed range of 50-800 mm/s.
The CB back cover is a double clevis designed to allow the cylinder body to pivot, which prevents binding when the load path changes angle. Impact absorption is handled by fixed TPU bumpers at both ends, but these only decelerate the last few millimeters of travel; for heavy tooling mass at high speeds, you should meter-out the exhaust or add an external shock absorber.
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Related AirTAC PB Pen-Size Cylinders
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